Banana.

I think that violence can be adequately defined as “the instigation of aggression/harm against peaceful beings.” Hierarchy is not strictly required for this.

More about CLAs for those interested: Seriously, don’t sign a CLA by Drew Devault

Is a fruitarian someone who only eats fruit?

Yes.

Do these people exist?

Yes, though not many of them as far as I know.

Do they have normal bathrooms?

Most probably poop outside or in a bucket, at least if their situation allows.

Probably ‘Silk’, AKA Latundan, from the Philippines.

People are working on it.

Lychee can grow at tropical latitudes, but it needs hot (rainier) summers and (drier) winters w/ 50-150 hours at 0-12°C in order to fruit well, so it’s more of a subtropical fruit.

Properly scaled up, this type of community reforestation effort could work.